Help us understand the problem. What is going on with this article?

nickelで簡単APIサーバ

More than 1 year has passed since last update.

環境

  • winodws 10
  • wsl2

Rustのインストール

wsl2上のRustの開発環境をセットアップしておく。

$ curl https://sh.rustup.rs -sSf | sh
入力を求められるので
> 1
$ echo 'export PATH="$HOME/.cargo/bin:$PATH"' >> ~/.bashrc
$ source ~/.bashrc

インストールできたか確認

適当なディレクトリで

$ cargo new hello
$ cd hello
$ cargo build
$ cargo run
> Hello, world!

実行時このようなエラーが出た場合

note: No such file or directory (os error 2)

buildに必要なものが足りていないので、build-essentialをインストールする。

$ sudo apt update
$ sudo apt install build-essential 

REST APIの実装

公式のチュートリアルを見て実装するもエラー吐いてbuildできなかったので(JSONのパースでこける)ので、ゴリゴリ書く。

Cargo.toml
[package]
name = "hello"
version = "0.1.0"
authors = ["ubuntu"]
edition = "2018"

# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

[dependencies]
rustc-serialize = "0.3"
reqwest = "0.9"
serde = { version = "1.0", features = ["derive"] }
serde_json = "1.0"

[dependencies.nickel]
version = "*"
# If you are using the 'nightly' rust channel you can uncomment
# the line below to activate unstable features
# features = ["unstable"]

# Some examples require the `rustc_serialize` crate, which will
# require uncommenting the lines below
# [dependencies]
# rustc-serialize = "*"

[dev-dependencies]
serde_derive = "1.0"
rust
#[macro_use] extern crate nickel;
extern crate rustc_serialize;

use std::collections::BTreeMap;
use nickel::status::StatusCode;
use nickel::{Nickel, JsonBody, HttpRouter, MediaType};
use rustc_serialize::json::{Json, ToJson};
use serde::{Serialize, Deserialize};

#[derive(Debug, Serialize, Deserialize)]
struct Person {
    firstname: String,
    lastname:  String,
}

impl ToJson for Person {
    fn to_json(&self) -> Json {
        let mut map = BTreeMap::new();
        map.insert("firstname".to_string(), self.firstname.to_json());
        map.insert("lastname".to_string(), self.lastname.to_json());
        Json::Object(map)
    }
}

fn main() {
    let mut server = Nickel::new();

    server.post("/", middleware! { |request, response|
        let person = try_with!(response, {
            request.json_as::<Person>().map_err(|e| (StatusCode::BadRequest, e))
        });
        format!("Hello {} {}", person.firstname, person.lastname)
    });

    server.get("/raw", middleware! { |_, mut response|
        response.set(MediaType::Json);
        r#"{ "foo": "bar" }"#
    });

    server.listen("127.0.0.1:6767").unwrap();
}

これだけ書いておけば大体の人は使えるやろ(適当)

momokura
Why not register and get more from Qiita?
  1. We will deliver articles that match you
    By following users and tags, you can catch up information on technical fields that you are interested in as a whole
  2. you can read useful information later efficiently
    By "stocking" the articles you like, you can search right away